Water Treatment Plant Design Service And Supervision In Bangladesh

Have you ever wondered what happens to the water and garbage that is flushed down the toilet? How about after you've turned off the water in your tub? The contemporary wastewater-treatment facility uses fundamental physics and cutting-edge technology to purify even the dirtiest water, allowing it to return to the environment as a healthy member of the water cycle.

You probably don't give much thought to where the water in your tap comes from, but it almost certainly went through a municipal water treatment facility. Drinking water treatment plants and wastewater treatment plants are the two most common types of treatment facilities. Both purify the water, however the output of wastewater plants is often streams or rivers, whereas the output of drinking water plants is typically your city's pipe network distribution system.

Drinking water sources can be contaminated, and disease-causing substances must be removed with proper treatment. To supply safe drinking water to their communities, public drinking water systems employ a variety of water treatment processes.

What is a water treatment plant?

It is vital to utilize only clean water to live a healthy existence. However, potable water, or drinking water, is not readily available everywhere on the planet. A high number of individuals die each year as a result of drinking polluted water. There are various countries where drinking water is scarce.

The process of moving water through several procedures to improve its quality is known as water treatment. It entails the removal of suspended particles and other dangerous compounds to make the water suitable for use or reintroduction into the ecosystem.

It's one of the most effective methods for reintroducing water into the cycle, i.e. into the earth. Sewage water treatment plants or wastewater treatment and desalination are two divisions of the water treatment business.

The wastewater treatment plant is the most prevalent method of treating and eliminating contaminants from domestic and industrial wastewater. Desalination, on the other hand, is the treatment of saline water that involves techniques such as distillation and reverse osmosis.

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The most prevalent water treatment processes employed by public water systems

Depending on the quality of the water that enters the treatment facility, water in various areas may be treated differently. Because lakes, rivers, and streams contain more silt and pollutants and are more likely to be polluted than groundwater, surface water often requires more treatment and filtration.

Disinfection by-products, inorganic chemicals, organic compounds, and radionuclides are all possible contaminants in some water sources. Water treatment can also include specialized strategies for preventing or eliminating them.

So, how can a treatment facility take polluted river water and transform it into potable water? Well, most poisons and risks can be eliminated from water using chemical and filtration methods, and it can be made drinkable again.

Coagulation and flocculation

The settle able and dissolved materials suspended in the water must first be removed as part of the treatment process. Chemicals known as coagulants are added to the water to speed up the settling and removal process. Positively charged chemicals are introduced to the water.

The negative charge of dirt and other dissolved particles in the water is neutralized by the positive charge of these substances. When this happens, the particles connect with the chemicals and create floc, which are bigger particles. Aluminum sulfate is the most frequent coagulant, however it varies depending on the water treatment facility.


Due to its weight, floc sinks to the bottom of the water supply during sedimentation. Sedimentation is the term for this settling process.


Following sedimentation, a sand filter is usually used to filter the water. Sand filters have been used in water treatment since the beginning, and they are almost universally needed to be included in the treatment process to provide a consistent degree of purity.

The clear water on top will flow through filters of varied compositions (sand, gravel, and charcoal) and pore diameters to remove dissolved particles such as dust, parasites, bacteria, viruses, and chemicals once the floc has dropped to the bottom of the water supply.


The water should have a clarity (turbidity) of less than 3 Nephelometric Turbidity Units (NTU) after passing through the sand filter, or whatever the local water clarity code is. Although the water is clean, microorganisms can still be found.


After the water has been filtered, a disinfectant (such as chlorine or chloramine) can be added to kill any lingering parasites, bacteria, or viruses, as well as protect the water from pathogens when it is piped to homes and businesses.

Chloramines or chlorine-based compounds kill bacteria, but they also react with any organic matter that remains in the water. The rationale for adding chlorine last is because its combination with organic matter can produce disinfection byproducts, which can lead to the presence of carcinogens or other dangerous substances in the final water product.

Chlorine is utilized primarily for its ability to destroy microorganisms. Chlorine concentrations are active in the resultant drinking water, preventing microorganisms from entering the water through pipes or other sources of pollution.

Apart from chlorine, UV light is the most prevalent approach; however, ozone can also be utilized. UV light is shone through the water, scrambling the DNA of the bacterium. This does not kill them, but it prevents them from reproducing, making them harmless if consumed.

The sole disadvantage of this procedure is that it is a one-time treatment, which means there is no way to decrease the danger of bacteria entering the water system after the treatment plant.

Read also: What Is A Municipal Sewage Treatment Plant?

The role of a Water Treatment Plant

Water Treatment Plant Design Service and Supervision in Bangladesh

The increasing scarcity of freshwater has necessitated the purification of wastewater throughout the planet. The importance of water treatment to the world is due to the limited amount of freshwater on the planet and the huge demand for it.

Here are some examples of why water purification is important:

  • Environmental protection– Water treatment is extremely beneficial to the environment. It contributes to the water cycle's equilibrium by preserving groundwater and surface water.
  • Purified water from treatment facilities may be utilized for a variety of reasons, including drinking, domestic usage, industrial applications, agricultural, and irrigation, among others. This will tackle the problem of water scarcity, and it will assist countries with restricted access to safe water.
  • Purification facilities are especially significant because they help meet the growing demand for water.
  • It is critical to safeguard one's health– Water contains poisonous chemicals, metals, and other impurities that are hazardous to the health of people and other living beings. Asthma, cholera, diarrhea, asthma, cancer, skin issues, and even death are all caused by these hazardous compounds and pollutants. As a result, the number of individuals who die each year as a result of drinking polluted water will be reduced.
  • It ensures that water is not wasted - wastewater treatment facilities purify and release water discharged from houses and industry back into the community and natural environment. As a result, water waste is reduced.
  • It aids in the restoration of water — water is reintroduced back into the natural cycle through this procedure.
  • Another method of water purification is desalination. It's crucial because it turns salty water (which is essentially useless but abundant on the planet) to drinkable water. This might aid in resolving the global problem of water scarcity.

Read also: Types Of Sewage Treatment Plants

Green Dot Limited company in Water Treatment Plant Design Service and Supervision

Green Dot Limited is Bangladesh's leading water treatment plant importer, manufacturer, and supplier. Household water treatment, industrial water treatment, sea water treatment, wastewater treatment, and other sorts of water treatment solutions are all covered under the term water treatment plant.

Water Treatment Plants are industrial-scale procedures that improve the quality of water for a specific end-use, such as drinking, industry, or medicine.

Green Dot Limited is a forward-thinking, comprehensive environmental engineering and trading company in Bangladesh that specializes in the water purifier and water treatment industries. Since its inception, this firm has followed a strategic guiding idea of continuous progress.

In the fierce worldwide water purifier Bangladesh market rivalry, the firm has consistently advanced and achieved positive results. Green Dot Limited is a forward-thinking, comprehensive environmental engineering and trading company in Bangladesh that specializes in the water purifier and water treatment industries.

It has quickly risen to become one of Bangladesh's leading water businesses. Our divisional structure enables us to strategically focus on the specific demands of each market. We play a critical role in supplying high-quality items to our clients and raising the company's international brand recognition across a wide range of industries.

We've also strengthened our position in the local distribution industry by introducing a number of great overseas brands, using the Group's largest and most well-developed distribution network.

The company has developed a high-level youthful staff team, constructed a full set of sophisticated marketing systems, and established worldwide sourcing, all while adhering to the ideal of "Quality First, Service Perfect, and Prestige Supreme".

We will try our best to become the most amazing professional firm Water Purifier Bangladesh, with our superior management experience, extensive history, and stable market foundation. Effective implementations of new technologies are important to the success of any project in today's increasingly competitive and complicated corporate environment.

We are dedicated to acquiring and maintaining the specialized knowledge and skills required to assess, select, and execute water treatment technology. Green Dot Limited's methodology mixes theatrical expertise with real-world engineering and contracting skills.

Green Dot Limited is the only place in Bangladesh where you can receive a One-Stop Solution for a Water Treatment Plant. It offers water treatment solutions for a wide range of applications, from household appliances to full industrial operations, depending on the needs of the customer.

Our extensive knowledge, high-efficiency experience, and extensive know-how in all water treatment-related industries can provide you with a cost-effective solution that meets your water quality criteria.

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